China, France and South Korea would help in the construction of the proposed new stations, the energy department's director general Nelisiwe Magubane said.
The power stations, which formed part of the government's new proposed energy plan, would use "different technology".
"This project has actually not yielded the required results... we need them to re-look the research projects.
"But in the meantime we are still going to need additional power plants and we are going to use what we call conventional nuclear power as we use it in Koeberg, in Cape Town," she told the broadcaster.
"The government sees nuclear supplying 14% of the country's energy mix by 2030 and renewable energy by 16%, while the remaining capacity would come from open cycle gas turbines, pump storage schemes and imported power generated from hydroelectric plants."
More on Energy Development in South Africa: